/Engine/Plugins/Animation/RigLogic/Source/RigLogicLib/Public/dna/layers/DescriptorReader.h
Available levels of detail (e.g. 6 which means the following levels are available: [0,1,2,3,4,5], where 0 is the LOD with the highest details, and 5 is the LOD with lowest details).
std::uint16_t getLODCount() const